/Engine/Source/Runtime/Engine/Classes/GameFramework/OnlineReplStructs.h
Specify type trait support for various low level UPROPERTY overrides
template<> struct TStructOpsTypeTraits< FUniqueNetIdRepl > : public [TStructOpsTypeTraitsBase2< FUniqueNetIdRepl >](API\Runtime\CoreUObject\UObject\TStructOpsTypeTraitsBase2)